1 Topic by ciodide (edited by ciodide 2024-08-02 02:55:48)

  • ciodide
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Topic: i915 GPU HANG on GM45 iGPU with Xen

Description:
i915 GPU HANG on GM45 iGPU with Xen in Dom0, when you startx, dmesg show

i915 0000:00:02.0 [drm] GPU HANG:ecode 4:1:ffffffff, in X [1597]
i915 0000:00:02.0 Resetting chip for stopped heartbeat on rcs0
i915 0000:00:02.0 X[1597] context reset due to GPU hang

the ecode's "ffffffff" sometime will change to other random number. The X seems exit like normal without any useable (EE) in Xorg.0.log.

Additional information:
Everything done on a librebooted X200 with 1067a microcode build in to the CPU. (T9550 8G)
Xserver working well when using without Xen.

Xen boot option:
Without xen boot option, the system just blackscreen after 

:: running early hook [udev]

never get to a terminal.

with "iommu=no-igfx", everything seems fine in terminal, until you press the "startx"
with "iommu=0", nothing change, same with "iommu=no-igfx"
"dom0_mem=1024M,max:1024M dom0_max_vcpus=1 dom0_vcpus_pin", also not affect to the result.

WM:
If use cwm in xinitrc, the GPU hang will happen when I press "M-?", then (after few sec) the whole system not response to anything, need hard reset.
If use twm in xinitrc, the GPU hang will happen when "startx", then X seems exit normally, give me a chance to check dmesg and other logs.

Steps to reproduce:
Install xen with pacman, and rc-update add every xen*

I boot to Xen with grub like

multiboot /xen-4.14.1.gz dom0_mem=1024M,max:1024M dom0_max_vcpus=1 dom0_vcpus_pin iommu=no-igfx
module /vmlinuz-linux-libre-lts root=xxxx rootflags=xxx ro
module /initramfs-linux-libre-lts.img
boot

then startx.

Since xen in the repo, and (maybe?) most of the people use blobless laptop here. Any one has some experience in this scenario?

Maybe useful information:
At least, I find someone can run old QubesOs on x200?
https://groups.google.com/g/qubes-users … qhqZt9DAAJ
https://github.com/QubesOS/qubes-issues/issues/1594

2 Reply by throgh

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Re: i915 GPU HANG on GM45 iGPU with Xen

Thanks for reporting: The package xen is generic not used for any x-session in our usecases. Maybe you want generic to use qemu?
Especially because Hyperbola has not the intention to be used and / or work alike QubesOS.

Human being in favor with clear principles and so also for freedom in soft- and hardware!

Certainly anyone who has the power to make you believe absurdities has the power to make you commit injustices: For a life of every being full with peace and kindness, including diversity and freedom. Capitalism is destroying our minds, the planet itself and the universe in the end!

3 Reply by ciodide

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Re: i915 GPU HANG on GM45 iGPU with Xen

qemu not allow me passthru some pcie devices to VM unless I recompile the kernel with patch sad . GM45 group everything in a single group. Although this version of vt-d is useless.

I think is the time to decide which is more important to me X or pcie passthru.

Thanks for reply

4 Reply by throgh

  • throgh
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Re: i915 GPU HANG on GM45 iGPU with Xen

Got your usecase, thanks for making this open. Sure, that is really not working. I will also look out if there are possible fixes around.

Human being in favor with clear principles and so also for freedom in soft- and hardware!

Certainly anyone who has the power to make you believe absurdities has the power to make you commit injustices: For a life of every being full with peace and kindness, including diversity and freedom. Capitalism is destroying our minds, the planet itself and the universe in the end!